ubyte8.java

网络游戏天堂1的java源代码。。。。。

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * http://www.gnu.org/copyleft/gpl.html
 */
package l1j.server.server.types;

public class UByte8 {
	/**
	 * Converts a 32 bit unsigned/signed long array to a 8 bit unsigned byte
	 * array.
	 * 
	 * @param buff
	 *            the array to convert
	 * @return byte[] an 8 bit unsigned byte array
	 */
	public static byte[] fromArray(long[] buff) {
		byte[] byteBuff = new byte[buff.length * 4];

		for (int i = 0; i < buff.length; ++i) {
			byteBuff[(i * 4) + 0] = (byte) (buff[i] & 0xFF);
			byteBuff[(i * 4) + 1] = (byte) ((buff[i] >> 8) & 0xFF);
			byteBuff[(i * 4) + 2] = (byte) ((buff[i] >> 16) & 0xFF);
			byteBuff[(i * 4) + 3] = (byte) ((buff[i] >> 24) & 0xFF);
		}

		return byteBuff;
	}

	/**
	 * Converts an 8 bit unsigned char array to an 8 bit unsigned byte array.
	 * 
	 * @param buff
	 *            the array to convert
	 * @return byte[] an 8 bit unsigned byte array
	 */
	public static byte[] fromArray(char[] buff) {
		byte[] byteBuff = new byte[buff.length];

		for (int i = 0; i < buff.length; ++i) {
			byteBuff[i] = (byte) (buff[i] & 0xFF);
		}

		return byteBuff;
	}

	/**
	 * Converts an 8 bit unsigned char to an 8 bit unsigned byte.
	 * 
	 * @param c
	 *            the char value to convert
	 * @return byte an 8 bit unsigned byte
	 */
	public static byte fromUChar8(char c) {
		return (byte) (c & 0xFF);
	}

	/**
	 * Converts a 32 bit unsigned long to an 8 bit unsigned byte.
	 * 
	 * @param l
	 *            the long value to convert
	 * @return byte an 8 bit unsigned char
	 */
	public static byte[] fromULong32(long l) {
		byte[] byteBuff = new byte[4];

		byteBuff[0] = (byte) (l & 0xFF);
		byteBuff[1] = (byte) ((l >> 8) & 0xFF);
		byteBuff[2] = (byte) ((l >> 16) & 0xFF);
		byteBuff[3] = (byte) ((l >> 24) & 0xFF);

		return byteBuff;
	}
}